/Engine/Source/Runtime/RHI/Public/GPUDefragAllocator.h
Partially defragments the memory and tries to process all async reallocation requests at the same time. Call this once per frame.
Num bytes relocated.
virtual int32 Tick ( [FRelocationStats](API\Runtime\RHI\FGPUDefragAllocator\FRelocationStats) & Stats, bool bPanicDefrag )